public User Register(string username, string password)
        {
            User userObj = new User()
            {
                Username = username,
                Password = password,
                Role     = "Patient"
            };

            _db.Users.Add(userObj);
            _db.SaveChanges();
            userObj.Password = "";
            return(userObj);
        }
 public bool Save()
 {
     return(_db.SaveChanges() >= 0 ? true : false);
 }